Structure of Atoms

Front

What are valence electrons?

Back

Electrons on the outermost energy level of an atom.

Front

What experiment did Rutherford conduct to discover the proton?

Back

Gold Foil Experiment.

Front

How do you calculate the number of neutrons in an atom?

Back

Neutrons = Mass Number - Atomic Number.

Front

What determines the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the electrical charge of a neutron?

Back

Neutral.

Front

What is the nucleus of an atom composed of?

Back

Protons and neutrons.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the mass of a proton compared to a neutron?

Back

Protons and neutrons have approximately the same mass.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the significance of the atomic mass unit (amu)?

Back

It is a standard unit of mass that quantifies mass on an atomic or molecular scale.